Answer:
Black is the absence of all light. Things appear black when they do not reflect or emit light. White is the presence of all colors of visible light. Objects appear white when they reflect or emit all wavelengths of visible light (or at least three wavelengths - Red, Blue and Green - in equal intensity).
Explanation:
Answer:
F
=
9
5
C
+
32
Subtract 32 from both sides:
F
−
32
=
9
5
C
Multiply both sides by 5:
5
(
F
−
32
)
=
9
C
Divide both sides by 9:
5
9
(
F
−
32
)
=
C
or
C
=
5
9
(
F
−
32
)
Explanation:
Solution :
Here, we need to perform JOIN operation of the students and registration.
Use NATURAL JOIN operator 
and so no need to specify Join condition.
Also we need to selection operator tp select only those course whose major in "philosophy".
Finally we projection operator π to project only distinct students name who took at least three courses.
![$\pi [\sigma_{\text{student's nam}e} [ \sigma(\text{three courses}) \Join \text{"Philosophy"}]]$](https://tex.z-dn.net/?f=%24%5Cpi%20%5B%5Csigma_%7B%5Ctext%7Bstudent%27s%20nam%7De%7D%20%5B%20%5Csigma%28%5Ctext%7Bthree%20courses%7D%29%20%5CJoin%20%5Ctext%7B%22Philosophy%22%7D%5D%5D%24)
Answer: d)- Show benefits to receiver
Explanation: Indirect plan is the approaching a person in a indirect manner and just giving the hint about the main idea rather than presenting the main idea. For creating interest section the idea of attracting the receiver by showing the benefits of the plan is the major option. Because just by sharing the benefit and hint of plan,receiver tends to be attracted towards the plan .
Phones have made us spoiled because we have everything at our fingertips. we get what we want when we see something online and we want to get it all we do is ask and most of us receive. phone have made us unhappy mentally and physically because we see how other people have it like richer for instance and we want that and we get sad about weird things because of what we see like other peoples body’s how skinny someone is and how fat someone is it makes us sad because we just want to be like them.
